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            <article class="gt-post-content">
                <h2 class="post-title">
                    使用Gson创建/解析json格式文件
                </h2>
                <div class="post-info">
                    <time class="post-time gt-c-content-color-first">
                        · 2021-01-03 ·
                    </time>
                    
                        <a href="https://zydnc.gitee.io/05a5Tboj4/" class="post-tags">
                            # Gson
                        </a>
                    
                        <a href="https://zydnc.gitee.io/EU-phZhGZ/" class="post-tags">
                            # JSON
                        </a>
                    
                        <a href="https://zydnc.gitee.io/java/" class="post-tags">
                            # Java
                        </a>
                    
                </div>
                <div class="post-content">
                    <blockquote>
<p>本教程仅限于 <code>gsonv2.8.5</code> + <code>jdk1.8</code></p>
</blockquote>
<h2 id="一-在pomxml中加入gson的依赖文件">一、在pom.xml中加入gson的依赖文件</h2>
<pre><code class="language-xml">&lt;!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --&gt;
&lt;dependency&gt;
    &lt;groupId&gt;com.google.code.gson&lt;/groupId&gt;
    &lt;artifactId&gt;gson&lt;/artifactId&gt;
    &lt;version&gt;2.8.5&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>
<h2 id="二-书写代码使用无参构造创建json格式文本">二、书写代码，使用无参构造创建Json格式文本</h2>
<p><code>此处的Person同上次的org.json一样，是一个JavaBean对象</code></p>
<pre><code class="language-java">public static String createJsonText(){
        Person person = new Person(&quot;絷缘&quot;, 23, &quot;male&quot;, false, false, new String[]{&quot;Java&quot;, &quot;Linux&quot;, &quot;JavaScript&quot;, &quot;Vue&quot;, &quot;SemanticUI&quot;, &quot;NodeJS&quot;});
        Gson gson = new Gson();
        return gson.toJson(person);
}
</code></pre>
<h2 id="三-书写代码使用gsonbuilder在创建json之前设置高级属性">三、书写代码，使用GsonBuilder在创建Json之前设置高级属性</h2>
<pre><code class="language-java">public static String createJsonText(){
        Person person = new Person(&quot;絷缘&quot;, 23, &quot;male&quot;, false, false, new String[]{&quot;Java&quot;, &quot;Linux&quot;, &quot;JavaScript&quot;, &quot;Vue&quot;, &quot;SemanticUI&quot;, &quot;NodeJS&quot;});
        GsonBuilder gson = new GsonBuilder();
        //设置Json美化显示
        gson.setPrettyPrinting();
        //设置Json中key的首字母全部大写
        gson.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE);
        Gson gs = gson.create();
        return gs.toJson(person);
}
</code></pre>
<h2 id="四-书写代码使用gsonbuilder在创建json之前拥有格式化日期时间的功能">四、书写代码，使用GsonBuilder在创建Json之前拥有格式化日期时间的功能</h2>
<pre><code class="language-java">public static String createJsonText(){
        PersonWithBir person = new PersonWithBir(&quot;絷缘&quot;, 23, &quot;male&quot;, false, false, new String[]{&quot;Java&quot;, &quot;Linux&quot;, &quot;JavaScript&quot;, &quot;Vue&quot;, &quot;SemanticUI&quot;, &quot;NodeJS&quot;},new Date(System.currentTimeMillis()));
        Gson gson = new GsonBuilder().setDateFormat(&quot;yyyy-MM-dd&quot;).setPrettyPrinting().create();
        return gson.toJson(person);
}
</code></pre>
<h2 id="五-书写代码实现解析json格式文本">五、书写代码，实现解析Json格式文本</h2>
<p><code>person.json需要自己创建置于src目录（普通项目）或resources目录下（Maven项目）</code></p>
<pre><code class="language-java">public static void parseJson() throws IOException {
        InputStream is = GsonDemo1.class.getClassLoader().getResourceAsStream(&quot;person.json&quot;);
        BufferedReader br = new BufferedReader(new InputStreamReader(is, &quot;UTF-8&quot;));
        Gson gson = new Gson();
        Person person = gson.fromJson(br, Person.class);
        System.out.println(person);
}
</code></pre>
<blockquote>
<p>原文作者：絷缘<br>
作者邮箱：zhiyuanworkemail@163.com<br>
原文地址：<a href="https://zhiyuandnc.github.io/XXV7UsHKh/">https://zhiyuandnc.github.io/XXV7UsHKh/</a><br>
版权声明：本文为博主原创文章，转载请注明原文链接作者信息</p>
</blockquote>

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